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This is about the best explanation I could come up with too.

Yes, that is correct. Bronze replaced the 88%Cu/12%Ni composition used on the earlier Flying Eagle and first couple years of IHP and was also used for the two-cent coin.

Yes, these factors do play a role in the in-ground readings but I find the detector readings in air tests to differ after the dig also. I am going to do some more tests with non-dug coins and see if...

This has been a question of mine for a long time. Most IHP are the same size standard and composition as the vast majority of wheat cents yet a metal detector identifies they with a considerable...